10261838509 has 4 divisors (see below), whose sum is σ = 11051210716. Its totient is φ = 9472466304.

The previous prime is 10261838491. The next prime is 10261838533. The reversal of 10261838509 is 90583816201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90583816201 = 29 ⋅3123579869.

It can be written as a sum of positive squares in 2 ways, for example, as 5708558025 + 4553280484 = 75555^2 + 67478^2 .

It is a cyclic number.

It is not a de Polignac number, because 10261838509 - 2⁹ = 10261837997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10261838579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394686084 + ... + 394686109.

It is an arithmetic number, because the mean of its divisors is an integer number (2762802679).

Almost surely, 2^10261838509 is an apocalyptic number.

It is an amenable number.

10261838509 is a deficient number, since it is larger than the sum of its proper divisors (789372207).

10261838509 is an equidigital number, since it uses as much as digits as its factorization.

10261838509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789372206.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 10261838509 in words is "ten billion, two hundred sixty-one million, eight hundred thirty-eight thousand, five hundred nine".